This view shows enzymes only for those organisms listed below, in the list of taxa known to possess the
pathway.
If an enzyme name is shown in bold, there is experimental evidence for this enzymatic activity.

Summary:
Several kinds of cyclic triterpene hydrocarbons are produced by ferns. The key enzyme that is responsible for the biosynthesis of triterpenes are squalene synthases. Dryopteris crassirhizoma, leaflets shows the presence of dammara-20,24-dien (DCD). The enzyme squalene cyclase (SC) that produces this product has been cloned and the DCD represents the first SC that produces a tetracyclic triterpene hydrocarbon [Shinozaki08a].